i want to implement kaiser window for given data . but always give following error (i-e ??? Error using ==> fir1 at 77 Frequencies must be increasing. Error in ==> kieser at 23 hn=fir1(N-1,Fc,kaiser(N,beta))).following is my code.
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As=40;
passbandfreq=0.01;
transitionwidth=500;
fsamp=10000;
Fn=fsamp/2
fc=1200;
fc1=fc+normalizedtransitionwidth/2
fc2=fc-normalizedtransitionwidth/2
Fc1=fc1/Fn
Fc2=fc2/Fn
Fc=[Fc1,Fc2]
fcn=Fc/Fn
normalizedtransitionwidth=500/Fn
passbandfreq=10^(passbandfreq/20)-1
stopbandfreq=10^(-As/20)
delta=min(passbandfreq,stopbandfreq)
A=-20*log10(delta)
N=A-7.95/14.36*normalizedtransitionwidth
%%for A>=21dB and A<50dB
beta=0.5842*(A-21)^0.4+0.07886*(A-21)
hn=fir1(N-1,Fc,kaiser(N,beta))
[H,f]=freqz(hn,1.512,Fsamp)
anyone help please what should i do with frequency values in which error ocurred???
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Walter Roberson
2015-8-17
编辑:Walter Roberson
2015-8-17
Your code does not define normalizedtransmissionwidth until after it uses it.
Your N is not even close to being an integer -- it is about 58.715923542593 . Is using that as the number of points for a kaiser window defined? Is using 58.715923542593 as the order for the hamming window for fir1() defined?
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